Wrapped package



July l21, 1936.. s. R. HOWARD wRAPPEp PACKAGE Filed Aug. 3, 1934 |N-VENTOR BY 24u47 im .JAM ,t @mgm l ATTORNEY Patented July 21, i936 UITE WRAPPED PACKAGE stanleya. Howard, Milton. Mass., assignmto Pneumatic Scale Corporation, Limited, Quincy, Mass., a corporation of Massachusetts l'Application August 3, "i934, Serial No. 738,258

2 Claims.

This invention relates to a wrapped package, and more particularly to a tight-wrapped moisture-resisting package. V

y The object of the invention is to provide a `5 novel and highly eflicient moisture-resisting tight-wrapped package, possessing characteristics which render the package commercially suitable for the packaging of those `materials which heretofore presented serious diiiiculty on account 10 of their'tendency to absorb moisture.

WithV this general object in view and such others as may hereinafter appear, the invention consists in the moisture-resisting tight-wrapped package hereinafter described and particularly dened in the claims at the end of this specification.

In the drawing illustrating the preferred embodiment of the invention, Fig. 1 is a perspective of the moisture-resisting tight-wrapped package; zo Fig. 2 is a cross-section on the line 2-2 of Fig. 1; Fig. 3 is a detail illustrating one form of suitable apparatus for the application of paraiiin to one surface only of the wrapper; Fig. 4 is a detail of the mechanism for applying al separate layer of '25 adhesive to the paraflin layer; and Figs. 5 and 6 are views in section andy-ln plan, respectively, of a modified form of the wrapped package and the wrapper therefor.

In general, the present invention contemplates 30 a moisture-resisting tight-wrapped package comprising a package and a wrapper therefor. The wrapper is provided upon ltsinner surface with a layer` of wax, preferably paraffin, although if found desirable other suitable moisture-resisting materials may be used. The outer surface ofthe wrapper wax-free and may be provided with printing thereon. The wrapper is wrapped about thev package and adhesively aiiixed to all surfaces thereof, producing a tight-wrapped package,

- by an interposed layer of an adhesive capablel of bonding both to the paraln or other wax coating and also to the body of the package.

In the drawing which illustrates the preferred 45 embodiment of the, invention, I0 represents a package which may comprise any of the usual forms of packages now employed in the packaging of various commodities. The package I after having been filled vwith the commodity l'l and 50 closed is wrapped with a wrapper l2. The wrapper l2 is provided upon its inner surface only with a layer i4 of wax, preferably paraflin, leaving the outer surface i5 of the wrapper wax-free andv in a condition most suitable for the recep- `55. tion ofthe printed Jmatter I6 which is usually (ci. 229-87) f placed upon the outer surfaces of all wrapped packages.

The wrapper I2 is in accordance with the present invention adhesively affixed to the entire surface of the package, both to the side panels 5 and ends thereof, by a separate layer of an adhesiv capable of bonding lboth to the paraiiin layer I4 and to the surface of the package itself to thereby form a tightlywrapped and highly moisture-resisting package. In practice I prefer 10 f to utilize paraiiln as the coating I4 for the inner surfacel of the wrapper, and have experienced good results in securing the desired adhesion of "the parain layer i4 to the package by an adheslve having latex as a base. Various commercial forms of latex adhesives are now avail- 'able upon the market and such adhesive mate-v rials maybe successfully used to effect the adherence of the paramn layer to the package.

In producing the paraffin-coated wrapper with the paraffin layer on one surface only thereof,

. various known methods of coating may,l be employed, and in Fig. 3 Ihave illustrated one form of apparatus suitable for this purpose in which 20 represents a -paraiiin-applying roll arranged 25 to run in a heated bath 22 of parain to apply the layer of paraiiin to the under surface of the wrapper while the upper surface of the wrapper is chilled by a chilled roll 24, thereby congealing the parafn before the latter has had an opportunity to reach the upper and outer surface of the wrapper. The adhesive may be applied to either the package or the wrapper, and in Fig. 4 I have illustrated a conventional form of apparatus for applying `the adhesiveto the paraiiinv surface of the parafiin coated wrapper after the latter has passed through the apparatus shown in Fig. 3. This apparatus may comprise a pair of rolls 30, 3|, and a film of the adhesive is supplied to the lower roll 3l .to be 40 applied to the wrapper, from a bath 32 by a distributing roll 33 and transfer roll 34.

For some purposes it may be preferred to construct the wrapped package by wrapping about the package a wrapper having a paraiiin coating 45 `4l) on the inner surface only thereof so as to provide the wrapped package with a vwax-free outer surface and by rendering the paraffin coating suiiiciently adhesive by the`applcation of heat to the wrapped package and preferably'dur- 50 ing the wrapping thereof so that the wrapper 42 may be ladhesively afzed to the entire surface of the package by the single paraffin coating 40.

lIn order to form av most satisfactory? side seam,

the wrapper 42 is preferably provided with a wax+ 55 free strip 44, as shown in Fig. 6, along one marginal edge thereof, thereby enabling the parafiin coatings to be brought intoabutment, as illustrated in Fig. 5, in the formation of the side seam of the wrapped package. In order to form the side seam, a strip 46 of^g1ue or other adhesive may be utilized to cause the adherence of the wax-free overlapping contacting portions of the wrapperf From the description thus far it will be olbserved that in accordance with the present in'- vention an efficient and commercial form of moisture-resisting package is produced in which claimed is:-

1. As a. new article of manufacture, a moistureresisting tight-wrapped package comprising a package, a Wrapper therefor having a wax-free outer surface and a wax coating covering the entire inner surface with the exception of one marginal edge thereof for forming the side seam, the wax coating being bonded to both the entire surface of the package and to the entire surface of the wrapper in contact therewith, the marginal portions of the wrapper overlapping to form the side seam and having the adjacent surfaces of the overlapped portions wax-free and adhesively secured together.

2. As a new article of manufacture, a moistureresisting tight-wrapped package comprising a package, a wrapper therefor having a wax-free outer surface and a Wax coating covering its inner surface with the exception of one marginal edge thereof, said Wax coating being bonded to both the entire surface of the package and the entire surface of the wrapper in contact therewith, said 20 'package being wrapped with the marginal portions of the wrapper overlapping to form the side seam and to cause the marginal portions of the wax coating upon the inner surface of the wrapper to substantially abut one another.

' STANLEY R. HOWARD. 

